She appeared to be going make-up free, as she slipped her sunglasses onto her head.

Great genes! The 30-year-old actress chose spray-on denim jeans, as she stepped out with a pal in the city

She chatted over her bottled green juice with a blonde pal, before taking a stroll with a brunette acquaintance - everyone seemed to have received the memo to wear jeans.

Lena's hair was pulled into a high bun, as she carried a framed containing a collage of photos of herself.

She recently attributed her weight loss to Donald Trump's presidency - citing 'soul-crushing pain and devastation and hopelessness' in helping her slim down.

Keeping casual: Lena's hair was pulled into a high bun and she was make up free as she strolled with a pal

Snap happy: She apparently was carrying a framed containing a collage of photos of herself

However, it's more likely she's been following pal and trainer Tracy Anderson's programme.

Lena described approaching the trainer: 'I came to her and was like, "I have endometriosis, I have chronic physical pain, I just want to feel stronger I just want to have a stronger core, I want to feel like I have more power throughout my day, how do I get there?"'

On Friday she hit back at the attention on her changed size.

Posting on her Instagram, she wrote: 'I feel I've made it pretty clear over the years that I don't give even the tiniest of sh**s what anyone else feels about my body. I've gone on red carpets in couture as a size 14. I've done sex scenes days after surgery, mottled with scars. I've accepted that my body is an ever changing organism, not a fixed entity- what goes up must come down and vice versa.'

The long posting ended: 'Right now I'm struggling to control my endometriosis through a healthy diet and exercise. So my weight loss isn't a triumph and it also isn't some sign I've finally given in to the voices of trolls. Because my body belongs to ME--at every phase, in every iteration, and whatever I'm doing with it, I'm not handing in my feminist card to anyone. I refuse to celebrate these bulls**t before-and-after pictures. Don't we have infinitely more pressing news to attend to? So much love to all.'

Dunham, who wrote the 2014 memoir Not That Kind Of Girl, is wrapping up the sixth and final season of her critically acclaimed series Girls, where she plays up-and-coming writer Hannah Horvath.

Girls has just four episodes left. The series airs Sundays on HBO and is also available via HBO Go.

Lost weight: Lena was noticeably curvier previously, pictured October 2015